3.12.4 WorldWind Locations
Nasa's WorldWind program comes with a tiled location database that allows for
progressive disclosure of locations as you zoom in. The IDV makes use
of this database.
- Start fresh by clearing all displays and data and go
to a CONUS projection ( menu item).
- Create the
WorldWind display control
from the menu item.
- This is just like the
Location display control
except it lists layers.
- Zoom into Colorado and watch how the display changes.
- Zoom into Boulder. Remember, if things go blank you just zoomed
past the surface of the Earth. Use the menu item to reset the projection.
- Add a
Background Image and change the layer
- Keep zooming.
- Remove the
Background Image display control.
- Change projections to some other part of the world and see what is listed.